Improvement in brick-wlachines



TATES WALTER E. GARD, (DF-CHICAGO` ILLINOIS.

immuun-ENJ- In BRick-wlAta-miss.l

Speciiicationeiorming part of LettersPatent No. 155,584, dated January 12,1375; application filed July A20, Y1874.

To'alluhom yt-may concern: A

-Be it known that I, WALTER E. GARD', of Ohicago,.inthe county'ot Cook and State o f Illinois, have invented an Imprm-ed Brickldachine; and I do-l1ereby Vdeclarejthat the' following is' ,a full and exact description, reti erencc beings had to the accompanying draw* ings making"` part ofthis specification- Eigure 1 being a view 'of,the"111acl1ine in perspective, vthe top=of the pugniill vbeing shown aslifted from the machine; Fig; 2, 'a horizontal section'ot' `*the working end of the machine inqthe planeof the axisof'the driving-shaft; Fig. 3,a vertical section-thereof through-the molds and plungers, in a plane indicated by the linef x, Fig. 2;

. Likeletters designate corresponding parts o in all of the ligure u This improved machine is organized to powerfully compress` the bricks at the incluent of molding `them,'theclay being driveliffrom the .pug-millinto stationary molds in one end or.- in the bottom thereof, 'and subjected therein' to the forming Yand lcompressing action 'of transversely-movin g plun gers',` while the driving foi-'cept' screw in the pug-mill is pressing the clayintothe saidmolds.

There `are -alsoseveral' peculiarities in the construction and operation ot' the* compressing-plungers, vand in 1.a device AVtor delivering the bricks therefrom.`

' In thedrawings,Arepresents the frame or bed of the` machine.;B,-the png-mill'; C, the nlold-boxat the end thereof; land .1) the drivngshaft, being alsotheworking-shatt of the 'DugLm-ill, `the power being connnunicated to fthe machine at the endot' the-said indicatethby the crank E.

shaft, as

' .The mcl'iine is representedas a horizontal ene; but git may Lbefvertical, andthe mold-4 mill. Y l Y The inld-box() is a simple ca'se with a rectangular aperture, ot uniforni size, extending' longitudinally through its entire-length trans!-V` verseA to .the `pug-mill :and in' this aperture three plnn gers move-a central or inner plunging the requisite 'reciprocating motions. `The -from the other mold.

or diespaces, I I, respectively, between the two outer plungers andthe two ends of the inner plunger; and bricks are molded in them alternately as the plnngers reciprocate, so that a brick is forming in one mold while another -brick `already formed is being delivered open from-thefpugmill 'AB respectively into these molds, and twol more apertures, b b, are formed'in three sides ot" the mold-box, at some distance nearer the ends thereof than the apertures a a, through which outer aper- 4jtures the bricks are delivered from the machine.

All the plungers (G H H) move simultaneously in the same direction.

In Figs. 2 and. 'the plungers are represented as having just complet-ed their moveinent to the left, receiving clay from the pug mill into the right-hand mold, and delivering 'a `brick at the left-hand delivering-aperture.

The proper reciprocating movements of these pI'ungersI iind. can be producedin the simplest and best manner by means of a set ot' cranks, LUM M, the crank L turning in a vertical or transverse cam-slot, c, inthe inner plunger G-,and the vcranks M M similarly turning in vertical or transverse cam-slots d d in therespectiveout'er plungers H H.

*'.lh'e'revolving motions. of these `cranks, which are all jto move in the same 4direction at equal speeds, are easily produced by ex-` tending three shatts, fg y, to the other endet' the machineand providing them withpin ions, It Fi, ot' equal size, into 'all of which a single cog-wheekj, .on the. driving-shaft D gears. A

The shafts g g may be simple extensions of or identical with the shafts of the outer cranks ll/I M; but, since' the axes, ot"` all the cranks are inline with each other, the lower shaft j', being necessarily. out of line with the other two, is connectedfby-tw'o 'cog-wheels, k l, ot

crank L. Y

where -the `bricks are linally formed the proper .thickness thereof;` but when the plunger-s are in position toreceive the clay from `the pngmill,.as shown` atthe right-hand mold,

-in Figs.2 and 3, the plungers; are separated considerably more to introduce -thc requisite Two apertures, c a,

with nw shaft m. of nl@ middle o 'The cranks are at such distances apart as to produce in that part ot' their revolutionV quired in compressing.

'loeilectthis separation .of the plungcrs while they are driven-by the simple crank movements above specified therertical carnslots d-cl of the outer plungers have their inner surfaces. hollowed vout in concave form, opposite to the shafts ofthe cranks, as shown at 'n n, Fig.3,-while.tde surfaces o o-of-the central cam-slot c, which, for another purpose, are somewhat hollowed, are hollowed less than the surfaces n n, the e'e'ct'of which relative constructions is, that when the cranks come round against these hollows, as seen. in 1 `ig.'3, the outer plunger H is not moved inward so far as the middle plunger G, thereby producing the requisite separation at the termination of their inward movement. Then, in the outward movement of the plungcrs, the crank Inn-oyes ont of the hollow o into the straight part' of the slot' c sooner than the crankfv'M' moves out of its larger hollow n into the straight part ot' its slot d, and consequently thejnner plunger approaches nearer and nearer to the outer plun ger, thus vcompressing the clayin the mold, while the screw N of the pug-mill shaftcorr. tinues to act and press or hold the clay in the mold with any degree of pressure de- 4 sired. Thus the pressed.

amount of clav to compact thc bricksas re- .Ey the time that theiuner vhngrrasss.

by the aperture a leading froml the pug-mill, and the, unused clay is forced back, if in excess, and cut ott' from the m fully compressed in the mold and completely formed, being inclosedoii alllsides, the outer plunger not yet having opened clmrge-apertln-e b; but directly after this, in the outward movement ofthe plungers, the brick is` pushed out tothesaid dischargingaperture, as shown 'at the lcl't hand in As soon as the brick is completely formed and compressed in the mold, in order to prevent the puing of the sides of the brick andi the Adestruction of its perfect size and form, it is necessary that the plungers should nghin separate `somewhat more immediately after the final formation ofthe brick, or before it begins to be exposed to the dischargeopening.

To effect this purpose, I make the outer cranks M M a little longer than the inner crank L; and since, at the moment spokenof, the inner and outer cranks are moving in the straight parts of their respective cam-slots, the outer plunger, in consequence of the more rapid throw of its crank, travels faster than, and is thercbvjfarther separated from, the inner plunger, thus producing lthe requisite re. moval of the pressure from the brick.

As soon as the bricks are brought fully to the discharging-apertures b b they are automatically started -or separated from the moldbbv'by means of followers p p, located in the mold-box, as shown in Fig. 2.

ment they have an outward movement inl- Ibricks are thoroughly comold', the brick is to the dis- Fig. 2.,

At that mo-l 't t on the crank-shafts g g, and pins orprojections s's on the stems .by any equivalent means. They are, by the their recesses in the mold-box, the position being indicated at the right'h'aud in the said .g"u1-. -A f Y v The holloweu surfaces oo in the cam-slot c of the inner plunger G 'are required at the terminatiou'of its outer movement, in order to hold the plunger stationary while the bricks are being discharged. ,The outer plungers H H during that time outward, the outer surfaces of their cam-slots d d being straight.

VhatI claim as my inventionfand desire to secure by Letters Patent,'is-

ing bricks, a.1nold-box,G, forming the discharge end or bottom of the pug-mill, and provided with molding and compressing plungers G H H, which have ment therein, substantially as and pose herein speciiied.

2. In a machine for molding and compressing bricks, the combinationy of compressingplungers G H H, moving transverselyto the fung-millin. a mold-box, O, with a screw or )ther driver, N, in the pug-mill, which presses the Clay intethe 11'1old-'box, substantially as and for the purpose herein specified.

3. The combinatiouof arnold-box, C, 'hav- -ing inner clay-receiving apertures u a and outer brick-discharging apertures b'b, with reciprocating plungers G H H, 4which compress an'd mold the bricks therein, and pass them from the said inner to the said outer aperlor the purherein specilied.

having respective vertical or transverse caiuslots c d d, with the driving-cranks L M M, the 4latter exceeding the formerslightlyin length, 'substantially as and for 'the purpose herein specified.

cam-slots-d d inA the outer plungcrs H H, formed in relation to the cam-slot c of the n1- purpose herein spectied."

6. The hollowed surfaces o o of the cam-#slot c in the inner plunger G, in combination with the dischargi11g-apertures b b ofthe mold-box specified. I

7. The brick-discharging followers p p, operating as described, in combination with tlc moldbox C, having discharge-apertures b b, substantiallyas. and for thepurpose herein specified.

Specification signed b5 me this 7th dayof July, 1874. g

Witnesses: WALTERE. GARD.

W. D. STURTEVANT,

' PLUMER HAwoBrH.

fpartcd to' them, as indicated at the left handin the same ligure, by means of cam-grooves of the'said followers, or

same means, .again immediately returned to may continue to travel 1. In a machine for molding and eompressa reciprocating move' tures, substantially as and `for the purpose 4. The combination of the plungers G H H,

5. The hollowed inner surfaces nin of Athe 'ner plunger G, substantially as and for the C, substantially a's and for the purpose Aherein 

